Possibility of Monitoring SSL certificates expiration of custom websites in Azure

@Prakashraaj V Thanks for your comment. AFAIK, there is no specific service for monitoring ssl certificates expiration. But for websites, you can take advantage of Azure App Service Certificates where you can turn on automatic renewal of certificates. For more information, kindly refer this documentation.

Other possibility is to use Azure Automation Runbooks where you can have script to get the list of certificates with expiry date and send an email whenever the certificate expires. This PowerShell command Get-AzWebAppCertificate might help to retrieve list of App Service Certificates.